<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <my-com-a></my-com-a>
  </div>
  <script src="lib/vue.js"></script>
  <script>
    Vue.component('MyComA', {
      template: `
        <div>
          这是组件 A 的内容: {{ 1 + 2 * 3 }}
        </div>
      `
    });

    new Vue({
      el: '#app',
      data: {
        
      }
    });
  </script>
</body>
</html>